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  1. By: Riley, H P
    Type: Article
    In: Journal of South African botany
    Volume: 27
    Date: 1961
    Page Range: 65--71
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  2. By: Riley, H P
    Type: Article
    In: Journal of South African botany
    Volume: 26
    Date: 1960
    Page Range: 139--148
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  3. By: Riley, H P
    Type: Article
    In: Journal of South African botany
    Volume: 26
    Date: 1960
    Page Range: 37--44
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  4. By: Riley, H P - Isbell, C J
    Type: Article
    In: Journal of South African botany
    Volume: 29
    Date: 1963
    Page Range: 59--73
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  5. By: Riley, H P - Levyns, M R
    Type: Article
    In: Journal of South African botany
    Volume: 29
    Date: 1963
    Page Range: 33--41
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa